Mitsubishi E55LCD Service Manual page 43

TROUBLE SHOOTING
TABLE OF CONTENTS
1. No display of screen (Screen is black, color of LED is amber) ---------------------------------- 6-2
2. Nothing displays on screen (Screen is black, color of LED is green) -------------------------- 6-3
3. Checking the back light unit ----------------------------------------------------------------------------- 6-6
4. Abnormal screen ------------------------------------------------------------------------------------------- 6-7
5. Abnormal plug and play operation --------------------------------------------------------------------- 6-8
5.1 Abnormal DDC2 ------------------------------------------------------------------------------------------- 6-8
6. Checking the interface circuit of sync signal --------------------------------------------------------- 6-9
6.1 Checking the control circuit of horizontal sync pulse --------------------------------------------- 6-9
6.2 Checking the control circuit of vertical sync pulse ----------------------------------------------- 6-10
7. Checking the resolution change IC movement ----------------------------------------------------- 6-11
8. No power on ------------------------------------------------------------------------------------------------ 6-12
9. Checking the operation of CPU ------------------------------------------------------------------------ 6-13
6-1
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